Avian Visitors is a lovely project by [Teddy Warner] that uses a Raspberry Pi and microphone to keep track of which birds have been visiting your home, and creates a colorful illustration of recent visitors on top of it all. Based on that information, the system pulls bird images from a reference set for the region and creates a collage representing the breadth and frequency of visitors in a single image. That’s a cool project, but [Teddy] took things one step further by setting up a color E-Ink display to show a running summary of all the avian visitors the system identifies. Avian Visitors even has options for sending the latest detection to Home Assistant or over MQTT, allowing automation triggers based on specific bird species. The GitHub repository for Avian Visitors has everything you need to get set up, and the basic system needs little more than a Raspberry Pi and a USB microphone.